Preserves English charity, bringing in doctor (7)
I believe the answer is:
embalms
'preserves' is the definition.
(embalming is a kind of preserving)
'english charity bringing in doctor' is the wordplay.
'english' becomes 'e' (abbreviation).
'charity' becomes 'alms' (alms is a kind of charity).
'bringing in' indicates putting letters inside.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'e'+'alms'='ealms'
'ealms' enclosing 'mb' is 'EMBALMS'.
(Other definitions for embalms that I've seen before include "Preserves (as a mummy)" , "treats to stop the rot" .)